Joe gave you some sound advice. Go with the plan and make the best of this opportunity.
You didn't make a grave mistake. You are just trying to find your way.
From what I gather, you are trying to get him to snap out of his fog. I did the same type of things. Looking back, it felt like walking on eggshells, trying to be perfect and monitoring every little action of my W. Looking for any little sign of hope in her reactions. She knew that I wasn't going anywhere. Subconsciously, she kept me at an arms length. She was able to continue to live in her fantasy, because it didn't motivate her to make a change.
What motivated her to make a change, was when I accepted my life as a single father and began living my life accordingly. Which was without it. I had a realization that it wasn't as bad as I had feared. The beauty of that epiphany is that we have that choice.
To be clear, I was genuinely ready to move forward without her. It wasn't a trick to get her back. That's why you have to focus on yourself. Use this as an opportunity to grow and become the best person possible.
Hope this helps.
Me:45 ExW:48 M:04/97 3 Bombs & 2 ReCons 1st BD 11/10 D Finalized 4/20 D-16 S-14 Going in one more round when you don't think you can. That's what makes all the difference in life.~Rocky Balboa